Heckler & Koch HK416A5 Assault Rifle

Heckler & Koch HK416A5

AUTHORIZED DISTRIBUTOR FOR HECKLER & KOCH GOVERNMENT SALES

PAI Defense supplies premier tactical systems for military units, law enforcement agencies, and institutional clients. The Heckler & Koch HK416A5 is the benchmark 5.56mm tactical rifle trusted by elite global military and counter-terrorism units. Combining the ergonomic familiarity of the M4/AR-15 architecture with HK’s proprietary gas-operated piston system and toolless adjustable gas regulator, the HK416A5 delivers unmatched reliability when operating suppressed or under severe environmental contamination.

Procurement Strategy: This restricted tactical system is reserved for professional agency acquisition and authorized government transfer. Please reach out to us to ask for a quote or submit a request for proposal (RFP).
Authorized HK Parts Provider: As an official distributor for Heckler & Koch, PAI Defense supplies the complete ecosystem of HK parts, armors tools, and maintenance kits. Visit our HK Parts and Supplies category for dedicated lifecycle support and OEM replacement components.

Description

Manufacturer	Heckler & Koch
Caliber	5.56x45mm NATO (.223 Rem)
Operating Principle	Gas-Operated Short-Stroke Piston with Adjustable Regulator
Barrel Length Options	11″, 14.5″, 16.5″, and 20″ Cold Hammer-Forged Options
Receiver Material	High-Strength Forged Aluminum with Mil-Spec Hard Anodizing
Requirement Note	Restricted Law Enforcement / Military Agency Purchase Only

Piston-Driven Reliability Meets Standardized AR Ergonomics

The HK416A5 eliminates direct-impingement carbon fouling by routing expanding gases through an uncompromised short-stroke piston rod assembly directly against the bolt carrier group. Designed to exceed military endurance specifications, it provides tactical teams with uncompromising accuracy and durability in the harshest operational conditions.

Core Engineering & Tactical Advantages

Toolless Adjustable Gas Regulator: Optimized for flawless cycling when utilizing sound suppressors or operating in adverse field environments.
Fully Ambidextrous Controls: Includes mirrored bolt catches, safety selectors, magazine releases, and charging handle enhancements.
Cold Hammer-Forged Barrel: Premium cannon-grade steel barrel featuring chrome-lining and polygonal rifling for extreme service life and sub-MOA potential.